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Heights are normal with mean 100 cm and SD 10 cm. About 95% of heights lie between
A80 and 120 cm
B90 and 110 cm
C70 and 130 cm
D95 and 105 cm
Answer & Solution
Correct answer: A. 80 and 120 cm
Two standard deviations either side of 100 gives 80 to 120 cm, holding about 95 percent.
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